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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 30 · 40 questions
TalentJR

Remember (One part, one job): Resistor: limits current. Capacitor: stores a little charge. Diode: one way only. LED: one way and glows. Buzzer: sound. Motor: spinning. Potentiometer: a knob that changes resistance. LDR: light sensor. Thermistor: heat sensor. Fuse: protects by blowing. Transistor: boosts or switches.

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  1. 1.True or false: a diode boosts a small signal. (a) False (b) True
  2. 2.🧩 Which component blows if current is high? (a) thermistor (b) LED (c) fuse (d) transistor
  3. 3.🧩 Which component senses how bright it is? (a) thermistor (b) motor (c) LED (d) LDR
  4. 4.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a resistor (d) a buzzer
  5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
  6. 6.What does a resistor do? (a) senses how hot it is (b) glows using little power (c) lets current go one way (d) limits the current
  7. 7.What does an LDR do? (a) glows using little power (b) senses how bright it is (c) limits the current (d) beeps for an alarm
  8. 8.What does a buzzer do? (a) lets current go one way (b) senses how hot it is (c) beeps for an alarm (d) stores a little charge
  9. 9.True or false: a buzzer is a resistance knob. (a) True (b) False
  10. 10.True or false: a potentiometer has coloured bands. (a) True (b) False
  11. 11.What does a potentiometer do? (a) boosts a small signal (b) smooths a wobbly supply (c) is a resistance knob (d) beeps for an alarm
  12. 12.What does a resistor do? (a) boosts a small signal (b) senses how hot it is (c) stores a little charge (d) has coloured bands
  13. 13.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
  14. 14.True or false: an LED beeps for an alarm. (a) True (b) False
  15. 15.🧩 Which component senses how hot it is? (a) resistor (b) thermistor (c) buzzer (d) transistor
  16. 16.True or false: a capacitor makes things spin. (a) False (b) True
  17. 17.True or false: an LED is a resistance knob. (a) True (b) False
  18. 18.🧩 Which component smooths a wobbly supply? (a) capacitor (b) transistor (c) LED (d) resistor
  19. 19.What does a capacitor do? (a) smooths a wobbly supply (b) blows if current is high (c) glows using little power (d) boosts a small signal
  20. 20.What does an LED do? (a) makes things spin (b) glows using little power (c) makes a beeping sound (d) has coloured bands
  21. 21.What does a motor do? (a) glows using little power (b) stores a little charge (c) turns a fan or wheels (d) has coloured bands
  22. 22.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) buzzer (d) resistor
  23. 23.What does a diode do? (a) makes things spin (b) is a resistance knob (c) stores a little charge (d) lets current go one way
  24. 24.What does a fuse do? (a) makes things spin (b) stores a little charge (c) blows if current is high (d) is a resistance knob
  25. 25.What does a transistor do? (a) stores a little charge (b) blows if current is high (c) smooths a wobbly supply (d) boosts a small signal
  26. 26.🧩 Which component stores a little charge? (a) thermistor (b) capacitor (c) potentiometer (d) motor
  27. 27.What does a thermistor do? (a) senses how bright it is (b) limits the current (c) senses how hot it is (d) beeps for an alarm
  28. 28.True or false: a buzzer glows using little power. (a) True (b) False
  29. 29.True or false: an LED senses how bright it is. (a) False (b) True
  30. 30.True or false: an LED has coloured bands. (a) False (b) True
  31. 31.🧩 Which component limits the current? (a) capacitor (b) resistor (c) LDR (d) LED
  32. 32.🧩 Which component glows using little power? (a) LED (b) fuse (c) thermistor (d) diode
  33. 33.True or false: an LED turns a fan or wheels. (a) True (b) False
  34. 34.True or false: a fuse blows if current is high. (a) False (b) True
  35. 35.True or false: a buzzer makes a beeping sound. (a) False (b) True
  36. 36.True or false: a transistor turns a fan or wheels. (a) True (b) False
  37. 37.True or false: a capacitor is a resistance knob. (a) False (b) True
  38. 38.True or false: a potentiometer senses how bright it is. (a) True (b) False
  39. 39.True or false: a capacitor stores a little charge. (a) True (b) False
  40. 40.🧩 Which component turns a fan or wheels? (a) resistor (b) LDR (c) motor (d) thermistor

Answer key

  1. False
  2. fuse
  3. LDR
  4. a buzzer
  5. store charge briefly
  6. limits the current
  7. senses how bright it is
  8. beeps for an alarm
  9. False
  10. False
  11. is a resistance knob
  12. has coloured bands
  13. a motor
  14. False
  15. thermistor
  16. False
  17. False
  18. capacitor
  19. smooths a wobbly supply
  20. glows using little power
  21. turns a fan or wheels
  22. transistor
  23. lets current go one way
  24. blows if current is high
  25. boosts a small signal
  26. capacitor
  27. senses how hot it is
  28. False
  29. False
  30. False
  31. resistor
  32. LED
  33. False
  34. True
  35. True
  36. False
  37. False
  38. False
  39. True
  40. motor

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